Machinist level with a perfume vial

Would it be possible to turn a sample perfume vial into a precision machinist level? I've given it a try and had some interesting findings as you will see in this video.
Precision machinist's levels are very sensitive and can detect very small slopes. The one I've made has a sensitivity of 0.01 millimeter over 200 millimeter or 0.4 thou over 7.9 inches.
Spirit levels are made using curved vials, and to make a level one should make a bended vial in the first place, not an easy thing to do. I also experimented capacitive sensors, but reverted back to the traditional technology of the bubble trapped into a vial.

Видео Machinist level with a perfume vial канала Accidental Science